.sideBar {
  position: fixed;
  right: 10px;
  top: calc(50% - 75px);
  width: 50px;
  height: 152px;
  font-size: 20px;
  background-color: #fafafa;
  border: 1px solid #dcdcdc;
  z-index: 5
}

.sideBar > li {
  width: 100%;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px dashed #dcdcdc;
  transition: all .5s
}

.sideBar > li:hover {
  background-color: #efefef
}

.sideBar > li:last-child {
  border-bottom: none
}

.sideBar > li img {
  width: 35px;
  height: 35px
}

.qr_code {
  position: relative
}

.qr_code > div {
  display: none;
  width: 200px;
  height: 200px;
  transition: .5s;
  position: absolute;
  right: 50px;
  top: 0
}

.qr_code > div > img {
  width: 100%;
  height: 100%
}

.qr_code:hover > div {
  display: block
}